/* -------------------------------------------------------------------------
 *
 * pg_depend.h
 *      definition of the system "dependency" relation (pg_depend)
 *      along with the relation's initial contents.
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/catalog/pg_depend.h
 *
 * NOTES
 *      the genbki.pl script reads this file and generates .bki
 *      information from the DATA() statements.
 *
 * -------------------------------------------------------------------------
 */
#ifndef PG_DEPEND_H
#define PG_DEPEND_H

#include "catalog/genbki.h"

/* ----------------
 *        pg_depend definition.  cpp turns this into
 *        typedef struct FormData_pg_depend
 * ----------------
 */
#define DependRelationId  2608
#define DependRelation_Rowtype_Id 11631

CATALOG(pg_depend,2608) BKI_WITHOUT_OIDS BKI_SCHEMA_MACRO
{
    /*
     * Identification of the dependent (referencing) object.
     *
     * These fields are all zeroes for a DEPENDENCY_PIN entry.
     */
    Oid         classid;        /* OID of table containing object */
    Oid         objid;            /* OID of object itself */
    int4        objsubid;        /* column number, or 0 if not used */

    /*
     * Identification of the independent (referenced) object.
     */
    Oid         refclassid;        /* OID of table containing object */
    Oid         refobjid;        /* OID of object itself */
    int4        refobjsubid;    /* column number, or 0 if not used */

    /*
     * Precise semantics of the relationship are specified by the deptype
     * field.  See DependencyType in catalog/dependency.h.
     */
    char        deptype;        /* see codes in dependency.h */
#ifdef CATALOG_VARLEN
    text        depsrc;     /* full name of function */
#endif
} FormData_pg_depend;

/* ----------------
 *        Form_pg_depend corresponds to a pointer to a row with
 *        the format of pg_depend relation.
 * ----------------
 */
typedef FormData_pg_depend *Form_pg_depend;

/* ----------------
 *        compiler constants for pg_depend
 * ----------------
 */
#define Natts_pg_depend                8
#define Anum_pg_depend_classid         1
#define Anum_pg_depend_objid           2
#define Anum_pg_depend_objsubid        3
#define Anum_pg_depend_refclassid      4
#define Anum_pg_depend_refobjid        5
#define Anum_pg_depend_refobjsubid     6
#define Anum_pg_depend_deptype         7
#define Anum_pg_depend_depsrc          8


/*
 * pg_depend has no preloaded contents; system-defined dependencies are
 * loaded into it during a late stage of the initdb process.
 *
 * NOTE: we do not represent all possible dependency pairs in pg_depend;
 * for example, there's not much value in creating an explicit dependency
 * from an attribute to its relation.  Usually we make a dependency for
 * cases where the relationship is conditional rather than essential
 * (for example, not all triggers are dependent on constraints, but all
 * attributes are dependent on relations) or where the dependency is not
 * convenient to find from the contents of other catalogs.
 */

#endif   /* PG_DEPEND_H */

